Jack O'Brien boxeador
- combates
- 5
- ganados
- 0
- perdidos
- 5
- empates
- 0
- Estado
- inactive
- División
- super lightweight
- Debut
- 1896-02-11
- Altura
- -
- Alcanza
- -
- Edad
- -
- Nacimiento
- -
- Muerte
- -
- Nacionalidad
- United Kingdom
| Fecha | Oponente | Resultados últimos oponentes | Lugar | Resultado |
|---|---|---|---|---|
| 1909-04-03 | Mike Mobbs | WLWWLL | Britannia Theatre, Hoxton | LOST Points |
| 1903-10-15 | Jack Andrews | WLLLL | National Sporting Club, Covent Garden | LOST KO |
| 1899-11-13 | Jack Rowe | debut | National Sporting Club, Covent Garden | LOST Points |
| 1898-10-03 | Bill Dean | debut | National Sporting Club, Covent Garden | LOST KO |
| 1896-02-11 | Jewey Cook | WWLWWL | Excelsior Hall, Bethnal Green | LOST Points |